Five multiple choice science questions.

Which surface feature of the moon is characterized by mountainous areas? terrae craters maria regolith

The focal length of a relaxed human eye is approximately 1.7 cm. when we focus our eyes on a close up object, we can change the refractive power of the eye by about 16 diopters. (a) does the refractive power of our eyes increase or decrease by 16 diopters when we focus closely? explain. (b) calculate the focal length of the eye when we focus closely.

How many neutrons does element x if it’s atomic number is 28 and its mass number is 87